njrat | 81031472eeb908ed589389691db52b4f98b54feb7b4756ae3cf2321bb7c76bf9

General

Target

Nursultan.exe
Size

16.0MB
MD5

beaee64bd6a530d7a69b85ab1bf2a96e
SHA1

aafa8607eac3f3ac39d762920fe51e9b2a86eddb
SHA256

8d34437645bea72a222b0655712350a2f8cbd6c9cd8418ee7e04716a1af0adc6
SHA512

156e6a3e16c9fde1691a79afb054e2d872f95ef2ead55c5313e89ad2c799149e7c5656e04774e119cfd99de2afd1661cc60bcd43a16617aee3d78c81c2c5108b
SSDEEP

393216:i/JFQOEKdqGdVgT7uOPXtWV0HVvvoP7cI/NG1CMkCCk3Brj:6KOEKd9dK7uOPXtW8otAwMkCCuBf

Score

10^/10

njrat xworm discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

Ymniiz-29322.portmap.host:29322

Attributes

Install_directory
%ProgramData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000c000000023bc6-4.dat	family_xworm
behavioral1/memory/3052-25-0x0000000000860000-0x000000000087C000-memory.dmp	family_xworm

Njrat family
njrat
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm
njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4116	powershell.exe
396	powershell.exe
384	powershell.exe
1184	powershell.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	Nursultan.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	ego xworm.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	ego xworm.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	ego xworm.exe

Executes dropped EXE 2 IoCs

pid	Process
3052	ego xworm.exe
4980	ego SheetRat.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	ego xworm.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
5	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Nursultan.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4116	powershell.exe
4116	powershell.exe
396	powershell.exe
396	powershell.exe
384	powershell.exe
384	powershell.exe
1184	powershell.exe
1184	powershell.exe
3052	ego xworm.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3052	ego xworm.exe
Token: SeDebugPrivilege	4116	powershell.exe
Token: SeDebugPrivilege	396	powershell.exe
Token: SeDebugPrivilege	384	powershell.exe
Token: SeDebugPrivilege	1184	powershell.exe
Token: SeDebugPrivilege	3052	ego xworm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3052	ego xworm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 3052	4916	Nursultan.exe	83
PID 4916 wrote to memory of 3052	4916	Nursultan.exe	83
PID 4916 wrote to memory of 4980	4916	Nursultan.exe	84
PID 4916 wrote to memory of 4980	4916	Nursultan.exe	84
PID 3052 wrote to memory of 4116	3052	ego xworm.exe	87
PID 3052 wrote to memory of 4116	3052	ego xworm.exe	87
PID 3052 wrote to memory of 396	3052	ego xworm.exe	89
PID 3052 wrote to memory of 396	3052	ego xworm.exe	89
PID 3052 wrote to memory of 384	3052	ego xworm.exe	91
PID 3052 wrote to memory of 384	3052	ego xworm.exe	91
PID 3052 wrote to memory of 1184	3052	ego xworm.exe	93
PID 3052 wrote to memory of 1184	3052	ego xworm.exe	93

C:\Users\Admin\AppData\Local\Temp\Nursultan.exe
"C:\Users\Admin\AppData\Local\Temp\Nursultan.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Users\Admin\AppData\Local\Temp\ego xworm.exe
  "C:\Users\Admin\AppData\Local\Temp\ego xworm.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\ego xworm.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4116
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'ego xworm.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:396
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:384
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1184
- C:\Users\Admin\AppData\Local\Temp\ego SheetRat.exe
  "C:\Users\Admin\AppData\Local\Temp\ego SheetRat.exe"
  2⤵
  - Executes dropped EXE
  PID:4980

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
83685d101174171875b4a603a6c2a35c

SHA1
37be24f7c4525e17fa18dbd004186be3a9209017

SHA256
0c557845aab1da497bbff0e8fbe65cabf4cb2804b97ba8ae8c695a528af70870

SHA512
005a97a8e07b1840abdcef86a7881fd9bdc8acbfdf3eafe1dceb6374060626d81d789e57d87ca4096a39e28d5cca00f8945edff0a747591691ae75873d2b3fb5

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
65a68df1062af34622552c4f644a5708

SHA1
6f6ecf7b4b635abb0b132d95dac2759dc14b50af

SHA256
718dc2f5f4a6dbb7fab7f3db05bd7f602fb16526caae7084ab46c3ab4e7bad35

SHA512
4e460eb566032942547b58411222dd26ae300a95f83cf5ae6df58ebd28594341123611b348bd4031a33bc7f38307d5cb8fb677bba8c896919e3eee677a104d4d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3sdlk0of.moc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\ego SheetRat.exe

Filesize
454KB

MD5
560e99b6c7ef0c8379c0eb822b69277a

SHA1
60a1a81afea807ad32443fb4079a1c7c7b2b219a

SHA256
3cee18da6757e751754d3060d9b907fb0c27dd749719aa28dfdeb0da5b436707

SHA512
6089200d80fdd3d64031e1fa3dcfc35afd33890fe7ce1a553459c0caa8b4e89cf80f4b14dc9a793a81df12aacf05b52a3e2a42fda89640558a894a17ce823a0b

Download Submit
C:\Users\Admin\AppData\Local\Temp\ego xworm.exe

Filesize
84KB

MD5
bf5584cb45ea000cf117223bbecfadc3

SHA1
bef048a9b8cbc7710bc7fd804de278c1ec583a78

SHA256
2e640c3e94ce6f6a5166a4bbb86889ad8726d6252242a2847c745751da393f73

SHA512
ef5ea25241000edb1a313523d60839cbd1f9bff682159b80dcecec8678e6f0820db3bbc799e8ab522c6132f36dd4fc5bab99870facdb537bb8c8e4a908342637

Download Submit
memory/3052-14-0x00007FFFF3503000-0x00007FFFF3505000-memory.dmp

Filesize
8KB

Download
memory/3052-25-0x0000000000860000-0x000000000087C000-memory.dmp

Filesize
112KB

Download
memory/3052-81-0x00007FFFF3500000-0x00007FFFF3FC1000-memory.dmp

Filesize
10.8MB

Download
memory/3052-79-0x00007FFFF3503000-0x00007FFFF3505000-memory.dmp

Filesize
8KB

Download
memory/3052-28-0x00007FFFF3500000-0x00007FFFF3FC1000-memory.dmp

Filesize
10.8MB

Download
memory/4116-34-0x000001E0FB300000-0x000001E0FB322000-memory.dmp

Filesize
136KB

Download
memory/4916-23-0x0000000000400000-0x000000000140A000-memory.dmp

Filesize
16.0MB

Download
memory/4980-27-0x00007FFFF3500000-0x00007FFFF3FC1000-memory.dmp

Filesize
10.8MB

Download
memory/4980-24-0x00000000006F0000-0x0000000000768000-memory.dmp

Filesize
480KB

Download
memory/4980-80-0x00007FFFF3500000-0x00007FFFF3FC1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads